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<H2>iterator</H2>
<P><B>Module:</B>&nbsp;&nbsp;Standard C++ Library&nbsp;&nbsp;&nbsp;<B>Library:</B>&nbsp;&nbsp;<A HREF="2-8.html">Iterators</A></P>

<PRE><HR><B><I>Does not inherit</I></B><HR></PRE>

<UL>
<LI><A HREF="#sec1">Local Index</A></LI>
<LI><A HREF="#sec2">Summary</A></LI>
<LI><A HREF="#sec3">Synopsis</A></LI>
<LI><A HREF="#sec4">Description</A></LI>
<LI><A HREF="#sec5">See Also</A></LI>
<LI><A HREF="#sec6">Standards Conformance</A></LI>
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<A NAME="sec1"><H3>Local Index</H3></A>
No Entries
<A NAME="sec2"><H3>Summary</H3></A>
<P>A base iterator class</P>
<A NAME="sec3"><H3>Synopsis</H3></A>

<PRE>#include &lt;iterator&gt;

namespace std {
  template &lt;class Category, class T, 
            class Distance = ptrdiff_t, class Pointer = T*,
            class Reference = T&amp;&gt;
  struct iterator
  {
     typedef T value_type;
     typedef Distance difference_type;
     typedef Pointer pointer;
     typedef Reference reference;
     typedef Category iterator_category;
  };
}
</PRE>
<A NAME="sec4"><H3>Description</H3></A>
<P>The <B><I>iterator</I></B> structure is a base class from which all other iterator types can be derived. This structure defines an interface that consists of five public types: <SAMP>value_type</SAMP>, <SAMP>difference_type</SAMP>, <SAMP>pointer</SAMP>, <SAMP>reference</SAMP>, and <SAMP>iterator_category</SAMP>. These types are used primarily by classes derived from <B><I>iterator</I></B> and by the <B><I><A HREF="iterator-traits.html">iterator_traits</A></I></B> class.</P>
<P>See the <A HREF="iterators.html">Iterators</A> section for a description of iterators and the capabilities associated with various types.</P>
<A NAME="sec5"><H3>See Also</H3></A>
<P><B><I><A HREF="iterator-traits.html">iterator_traits</A></I></B></P>
<A NAME="sec6"><H3>Standards Conformance</H3></A>
<P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 24.3.2</I></P>

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